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_i <br />� <br />� <br />� <br />li <br />� <br />� <br />9 <br />1Q <br />T1 <br />�� <br />f3 <br />�� <br />�� <br />1� <br />1r <br />�� <br />79 <br />7 [� <br />Roseville Skating Center and City Hail <br />FeasibilityStudy September23, 2007 <br />:ff. r.l•. . ._ <br />1V:I�: - <br />rf <br />4 �. . _ • <br />Ic.� Ar_ na r€i:�q ucf � E�I� �nargyr C�:la��a �20rJE f <br />44'1} � <br />- •% <br />�—� 7. � <br />. � . �' M1– r� . � <br />V �1 <br />�r <br />Jan t=eb Niar Ap� May Jun Jui Aug Ssp �ct Nov pec <br />--Thermal Energy From icc� plus Electrical Energy m0� Space Heating Energy Used in Building <br />Figure 16: This graph illustrates fhe relative amount of thermal energy dissipated to the outdoor <br />air through N�e cooling tower compared to the amount of natural gas burned to provide space <br />heating and service hot water in tl�e !ce Arena /Banquet Hall over one year. There are only two <br />monfhs in which the amount of energy dissipated by the cooling tower is /ess than the amount of <br />thermal energy needed to h�at the facility. <br />Over an entire year the amount of energy dissipated through the cooling tower <br />connected to the refrigeration system in the ice Arena is significantly greater than the <br />total amount of energy required to provide space heating and service hot water. Figure <br />17 illustrates the relative amounts of energy dissipated by the refrigeration plant and the <br />amount needed in the building to provide space heating and hot water. <br />•._.��� :�e� <br />rra:iK+ _.. <br />� <br />� i.SV4��.•`•, _ <br />Ice Arena / Banquet Mall Energy Balance (2006) <br />v <br />- •• r <br />�� „���M1, :k+ . ... . <br />�. �{;��•. 7•s.• t l' ' .. ,f '. <br />,.r�;..l,••. i•. �.'++• t <br />¢� . ' '{i:. •./. <br />�^•I��F:.r. :'. •'r+.}' rf .�.M1l.k. <br />}n! 1,'1 �{.�/ M1 . J..� M1r �' ��:'l,k:.'� ,�,'�'�L�:''l l <br />{ i { . . <br />• �. ,,,� �',/�� ' f•:.' � :0,9��£"�"'{:,k��,�'c +o-:••�. <br />_ ��fx �• °} t J .}:'�� <br />I ,� f '�'r?���� .'",��'��..����o <br />l1icr� kyl Energy Dissipated bylce Arena Cooling Tower Thermal EnergyRequired for Space & Water Heating � <br />Figure 17: The total amount of thermal energy dissipated through the cooling tower at the ice <br />Arena is approximately 1.9 times greater than the amount of thermal energy needed to provide <br />space heating and producing hot water for showers and resurfacing the ice. <br />The refrigeration system for the (ce Arena is in operation every month of the year to <br />maintain the ice temperature. Thermal energy is removed from the ice surface almost <br />Geo-Xergy Systems Page 16 of �3 <br />